Control system
CA 2111224 A1 · Owner: Strid, Kent · Inventors: Oswaldsson, Rolf; Rasmussen, Sigmund; Hýrlyk, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described a control system for a filtration assembly wherein the amount of medium introduced into the filtration assembly is constant, even though the filterability of the medium or the condition of the filters has changed, in that the working cycle of the filtration assembly changes when the pressure difference across the filter mesh increases over a certain period of time said control system being capable of distinguishing between the filterability of the medium introduced and the condition of the filter mesh.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 5, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.